to use constant functions aswell (+3% speed 0.o)
according to PipeDream there is no difference between constant and usual function/variable.
so i don't see the reason for this "+3% speed", prooflink ?
the only thing is JassHelper inlines, but afaik it inlines any function (which can be inlined) not depending constant ot not. constant vars can be inlined by war3mapoptimizer.